JP3064160U - Light emitting device at the top of a mobile phone antenna - Google Patents

Abstract

(57) [Abstract] [Object] It is an object of the present invention to provide a light emitting device capable of selecting an effective light emission even with a weak radio wave. A printed circuit board is protruded from a tip of an antenna rod of a mobile phone, and the mobile phone is mounted on the substrate.
A coil 6 electromagnetically coupled to the transmission / reception carrier wave, a one-stage or a plurality of voltage converters 8 connected thereto via a diode 7, and a light-emitting diode 9 which is lit by the output of the voltage converter 8; To drive light emitting diodes with a large size.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 The present invention relates to a light-emitting device at the top of an antenna of a mobile phone, and the light-emitting device that notifies by light emission that the mobile phone is in a transmission / reception state.

[0002]

[Prior art and problems]

 Mobile phones are usually equipped with telescopic antennas. At the tip of the antenna, the transmitted and received radio waves are detected and a light-emitting device such as an LED is turned on to put the mobile phone into a transmitting / receiving state. A light-emitting device is mounted so that the user knows that the device is operating (Japanese Patent Laid-Open No. Hei 10-197581, utility model registration fee 300007220, etc.).

In the conventional configuration of this light emitting device, an LED serving as a light emitting body is mounted on an LC resonance circuit tuned to a transmission / reception radio wave of a portable telephone attached to a tip of an antenna rod.

[0004] However, conventionally, only one base station is connected to a mobile phone, and when moving out of the communicable area, a communication method of switching to another base station and connecting is adopted. In a communication method such as CDMA1, the number of base stations is increased and communication is always performed simultaneously with a plurality of base stations. When one of the base stations goes out of the communicable area, only that base station is switched to another base station. However, the method of always communicating with multiple base stations while maintaining the connection of other base stations is adopted. As a result, there is an advantage that there is no interruption of communication due to one base station moving in its entirety. I have.

However, in such a communication method, since there are many base stations, communication is performed using weak radio waves. Therefore, the LED of the conventional mobile phone does not emit light sufficiently, and especially, the LED of a blue color system is used. Is driven at a relatively high voltage, and has a drawback that effective light emission cannot be obtained with the conventional device. Also, the conventional light-emitting device could not provide sufficient lighting for communication in a remote place where the radio wave condition is poor.

[0006]

【Purpose】

 The present invention has been made in view of the above-described problems, and has as its object to provide a light emitting device capable of selecting an effective light emission even with a weak radio wave.

[0007]

[Means to solve the problem]

 The gist of the present invention is that a printed circuit board is protrudingly provided at the tip of the light-emitting diode, and a coil that is coupled to the transmission / reception carrier wave of the mobile phone in a self-contained manner, and one or more coils connected to this through a diode. A light emitting device at the top of an antenna of a mobile phone, comprising a circuit comprising a plurality of voltage converters and a light emitting diode which is turned on by the output of the voltage converter.

[0008] A mobile phone is a device for performing wireless communication, and an antenna rod is an antenna means for receiving or transmitting a predetermined radio wave. Usually, the length is adjusted to enhance the tuning effect. It is possible.

The printed circuit board protrudes from the tip of the antenna rod. If the antenna top fitting is fitted to the tip, the printed board protrudes above the antenna rod. In each case, it is electrically insulated.

[0010] The printed circuit board receives a coil that can be electromagnetically coupled in response to a radio wave generated in the antenna rod. This coil may be a normal coil part or a pattern-printed coil. When printing coils, it is desirable to use double-sided printing to gain gain. A rectifier diode is connected in series to this coil, and a voltage converter is connected.

A voltage converter is a converter that doubles an input voltage by an absolute value and outputs the same. Usually, an IC chip and two capacitors are used. The input voltage is extracted as a reverse voltage by a capacitor, and the input voltage is extracted. In addition to this, the voltage is extracted as a double voltage as an absolute value.

A light emitting diode is connected to an output terminal of the voltage converter. The color of the light emitting diode may be blue, green, red, or any other color. Blue light-emitting diodes are suitable for use with voltage converters because they light up when the voltage is above a certain level, even if the current is weak.

[0013]

[Action]

 Since the present invention is configured as described above, when the mobile phone is in the transmission / reception state, a voltage is generated on the antenna rod, and a coil on the printed circuit board electromagnetically coupled to the antenna rod is excited, and the voltage is generated. It is applied to the voltage converter via a diode.

The voltage converter doubles the input voltage and outputs the same, and the voltage turns on a diode connected to the output terminal. Therefore, even if the current is weak, even if the voltage is equal to or higher than a certain value, the light-emitting diode that is turned on also lights.

[0015]

【Example】

 In the following, description will be made with reference to the drawings shown as embodiments. Reference numeral 1 denotes a telescopic antenna rod provided at the front end of a mobile phone, and reference numeral 3 denotes a top fitting fitted at the front end.

Reference numeral 4 indicated by a dotted line denotes a light-transmitting cap. Reference numeral 5 denotes a printed circuit board planted on the top fitting 3. The printed circuit board 5 has a coil 6 (which is electrically insulated from the antenna rod 1 but can be electromagnetically coupled). Is printed.

In the circuit diagram shown in FIG. 2, a voltage generated in the coil 5 is converted into a direct current by a diode 7 and applied to a voltage converter 8. A reverse voltage of the input voltage appears on the capacitor C2 connected to the output side, and a voltage double in absolute value appears between the capacitor C2 and the input side. A light emitting diode 9 is connected to the output side to use this voltage.

FIG. 3 shows that voltage converters are connected in two stages 81 and 82 to achieve apparent voltage amplification.

【The invention's effect】

 As described above, the input voltage is apparently amplified using a voltage converter as well as a coil on the printed circuit board, a large absolute voltage value is obtained, and the light emitting diode is driven. Even in a communication environment or in a remote area where radio waves are weak, the blue light emitting diode with a large rated voltage can be driven sufficiently.

[Brief description of the drawings]

FIG. 1 is an enlarged perspective view of a top portion of an antenna.

FIG. 2 is a circuit diagram

FIG. 3 is a circuit diagram in which two stages of voltage converters are provided.

[Explanation of symbols]

1-antenna rod, 2-mobile phone, 3-top fitting, 4-cap, 5-printed circuit board, 6-coil, 7
-Diodes, 8-voltage converters, 9-light emitting diodes

Claims (2)

[Utility model registration claims] A printed circuit board protrudes from an end of an antenna rod of a mobile phone, and a coil which is electromagnetically coupled to a transmission / reception carrier of the mobile phone, and one or more coils connected to the coil via a diode. A light emitting device at the top of an antenna of a mobile phone, comprising a circuit comprising a plurality of voltage converters and a light emitting diode which is turned on by the output of the voltage converter. 2. The light emitting device according to claim 1, wherein the printed circuit board and the antenna rod are insulated.